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Post by stancejontland on May 11, 2019 16:30:18 GMT -5
Whats up guys. Got on the scoot today andi have no front brake pressure. So i checked the reservoir and its almost empty. Does brake fluid after awhile dissipate? It doesnt leak or anything. Also i have to reverse fill my scoot. With a syringe. Should i leave the top cap off while filling or just fill it with the top cap on and the"drain" my fill nipple open and fill. Also can i use automotive brake fluid? Thanks guys.
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Post by aeroxbud on May 12, 2019 4:22:38 GMT -5
Most vehicles will use standard Dot 4 fluid.
Something must be wrong if your losing fluid. It is a pretty much sealed system. Perhaps the pads are low. The fluid will go into the line as the piston comes further out.
The cap needs to be off. Why not fill the reservoir and pull it through the bleed nipple at the bottom?
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Post by stancejontland on May 12, 2019 10:30:07 GMT -5
It didn't work the normal way the first time i tried. Didnt get any pressure so i reverse fill. And i have good life on my pads. When i go to squeeze the lever it's comes all the way back to the handle. And it isnt leaking anywhere.
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Post by stancejontland on May 15, 2019 12:36:03 GMT -5
Ok so i filled it up and got pressure back to the front brakes. But my lever is pretty tough to squeeze. Do i need to bleed it? I have to grab it pretty hard just to slow down.
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Post by jackrides on May 15, 2019 12:42:11 GMT -5
Is the disc squeaky clean?
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Post by stancejontland on May 15, 2019 13:08:30 GMT -5
Its clean but i dont see what that has to do with it? I just bled it and no result. Still hard to pull.
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Post by aeroxbud on May 15, 2019 14:29:44 GMT -5
Usually when you find the lever hard to pull, with little brake effect the piston in the caliper is seized. If it hadn't been bled properly it would pull back easily.
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Post by stancejontland on May 15, 2019 15:46:09 GMT -5
Yeah its pretty tough to pull back to stop. I tried just bleeding it like a car. Hold down lever amd loosen nut. The lever went to the handlebar. Held it there while tightening the nut. But still no improvements.
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Post by 90GTVert on May 15, 2019 18:17:11 GMT -5
Bleeding isn't going to help a hard lever. Are you getting any symptoms other than a firm feel?
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Post by jackrides on May 15, 2019 18:23:56 GMT -5
Does the wheel spin freely off the ground?
When you last bled it you tightened the nut (I think you refered to the bleed valve), held it there till the nut was tight. When you then released the lever, did it freely come back out? I'm trying to make sure the lever itself moves freely.
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Post by stancejontland on May 15, 2019 19:18:50 GMT -5
Yes the lever is just fine. Wheel spins freely.
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Post by stancejontland on May 16, 2019 11:55:18 GMT -5
ok i got the brake system empty of fluid. where should i start.
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Post by aeroxbud on May 16, 2019 14:18:41 GMT -5
I would of checked to see it the piston in the caliper would move in, and out freely. Going to be hard to do with the system empty of fluid now.
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Post by stancejontland on May 16, 2019 22:36:15 GMT -5
Where is the piston for the brake? Do i have to remove the wheel? I looked before i drained it and the pads would clamp down onto the rotor with the lever. Lifted the front wheel off the ground and it spun freely.
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Post by aeroxbud on May 17, 2019 0:50:44 GMT -5
The piston is behind the brake pads. It's what pushes the pad against the disc. There will only be a couple of bolts holding It on.
It depends what type of caliper you have, on how many there are. If you have a sliding caliper there is only piston on one side. Or you might piston on both sides.
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